Reynesoceras is genus of ammonites that lived during the upper Pliensbachian stage of early Jurassic. It has evolved from Prodactylioceras, or Cetonoceras. Dactylioceras (Eodactylites) has probably evolved from this genus. Aveyroniceras is a name for macroconchs of this genus. Their fossils were found in Europe, northern Africa, Asia, North America and South America.[1][3]
| Reynesoceras | |
|---|---|
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | †Ammonoidea |
| Order: | †Ammonitida |
| Family: | †Dactylioceratidae |
| Subfamily: | †Dactylioceratinae |
| Genus: | †Reynesoceras Spath, 1936 |
| Type species | |
| Ammonites ragazzonii Hauer, 1861
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| Species | |
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| Synonyms | |
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Description
editAmmonites of this genus had shells with depressed whorl section and single, coarse ribs. Ribs are crossing venter, but there is no bifurcation, which is often present on other genera belonging to Dactylioceratidae. Also, there are no tubercules, which is a thing that differs them from Tokurites.[1][4]
Distribution
editBritish Columbia, Chile, Hungary, Italy and Morocco [5]
References
edit- ^ a b c M. K. Howarth 2013. Treatise on Invertebrate Paleontology, Part L, Revised, Volume 3B, Chapter 4: Psiloceratoidea, Eoderoceratoidea, Hildoceratoidea.
- ^ Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 2017-10-16.
- ^ Kovács, Z. (2014). Toarcian Dactylioceratidae (Ammonitina) from the Gerecse Mts (Hungary). Hantkeniana, 9, 45-77.
- ^ Repin Yu.S. Ammonitovaya shkala nizhney yury Severo-Vostoka Azii [Lower Jurassic ammonite geologic time scale of Northeast Asia]. Neftegazovaya Geologiya. Teoriya I Praktika, 2016, vol. 11, no. 4, available at: http://www.ngtp.ru/rub/2/47_2016.pdf
- ^ Paleobiology Database - Reynesoceras. 2017-10-16.
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